burrow-dig-delve-hive-den-hedge-nest-pigsty

burrow
Earthworms burrow deep into the soil.
蚯蚓钻土很深。
delve
She delved in her handbag for a pen.
她在手提包里翻找钢笔。
hive
The hive is made of wood.
这蜂箱是用木材做的。
den
Female bears tend to line their dens with leaves or grass.
母熊往往会在洞穴里垫些树叶或草。

pigsty
The office is a pigsty.
这间办公室像个猪圈。

When a bird's nest is overturned, no egg can remain intact.
覆巢之下无完卵。